---
product_id: 330827882
title: "Step Drill Bit Set, 7/8-Inch To 1-1/8-Inch (Dwa1789Ir)"
brand: "dewalt"
price: "30.66 OMR"
currency: OMR
in_stock: true
url: https://www.desertcart.com.om/products/330827882-step-drill-bit-set-7-8-inch-to-1-1
store_origin: OM
region: Oman
---

# Two-flute spiral design for efficient chip removal Laser engraved step numbers for easy visibility Titanium Nitride Coating for durability Step Drill Bit Set, 7/8-Inch To 1-1/8-Inch (Dwa1789Ir)

**Brand:** dewalt
**Price:** 30.66 OMR
**Availability:** ✅ In Stock

## Summary

> 🔧 Drill smarter, not harder — precision and power in every step!

## Quick Answers

- **What is this?** Step Drill Bit Set, 7/8-Inch To 1-1/8-Inch (Dwa1789Ir) by dewalt
- **How much does it cost?** 30.66 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/330827882-step-drill-bit-set-7-8-inch-to-1-1)

## Best For

- dewalt enthusiasts

## Why This Product

- Trusted dewalt brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Titanium Nitride coating extends bit life and resists wear
- • **Clear Step Visibility:** Laser engraved numbers make size identification instant
- • **Speed Meets Precision:** Split point tip accelerates drilling with less effort
- • **Impact-Ready Performance:** Optimized for use with impact drivers for maximum power
- • **Effortless Chip Clearance:** Two-flute spiral design ensures smooth debris removal

## Overview

The Dewalt Step Drill Bit Set (7/8" to 1-1/8") features a durable titanium nitride coating and a two-flute spiral design for superior chip removal. Its split point tip boosts drilling speed, while laser engraved step numbers enhance visibility. Engineered for impact driver compatibility, this bit set delivers professional-grade performance and longevity.

## Description

Full description not available

## Features

- Titanium Nitride Coated two flute spiral design provides longer life and better chip removal
- Split point tip increases speed
- Laser engraved numbers increases step visibility
- Optimized for impact driver usage

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | DeWalt |
| Part number | DWA1789IR |
| Item Weight | 4.54 g |
| Item model number | DWA1789IR |
| Size | One Size |
| Color | Multi |
| Style | 7/8" - 1-1/18" |
| Finish | Titanium Nitride |
| Material | Titanium Nitride Coated |
| Pattern | Solid |
| Shape | Rectangular |
| Power source type | Hand_powered |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Cutting Diameter | 1.13 Inches |
| Measurement System | Inch |
| Included components | 2 Steps: 7/8" and 1-1/8" |
| Batteries Included? | No |
| Batteries Required? | No |
| Item diameter | 1.13 Inches |

## Product Details

- **Material:** Titanium Nitride Coated
- **Cutting diameter:** 1.13 Inches
- **Finish type:** Titanium Nitride
- **Shank type:** Hex
- **Cutting angle string:** 135 Degrees

## Images

![Step Drill Bit Set, 7/8-Inch To 1-1/8-Inch (Dwa1789Ir) - Image 1](https://m.media-amazon.com/images/I/5197aeIgBXL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Do these work with the small 1/4 drive impacts?**
A: Yes, the DWA1790IR will work with the 1/4" Impact Driver.

**Q: Why do they advertise this as 7/8-Inch-1-1/8-Inch. Looks like it also does up to 7/8?**
A: I think the statement implies that is capable of doing an 7/8 hole for an 1/2 ko, and an 1 1/8 for a 1 inch ko. Also its a great step bit!

**Q: has anyone used these with stainless steel ? im looking at regular use with ss electrical panels and sheeting up to 1/4" thick.**
A: Yep, can be use with stainless steel like butter :)

**Q: Does these bits come in a carry case or bag**
A: No, this will not include a case or bag.

## Frequently Bought Together

- DEWALT Step Drill Bit Set, 7/8-Inch to 1-1/8-Inch (DWA1789IR)
- Forney 20857 Tap Magic Industrial Pro Cutting Fluid, 4 oz

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**Shop now:** [https://www.desertcart.com.om/products/330827882-step-drill-bit-set-7-8-inch-to-1-1](https://www.desertcart.com.om/products/330827882-step-drill-bit-set-7-8-inch-to-1-1)

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-01-27*